Marie M. Collins & Sylvie Weil-Sayre (1973). ”Flora Tristan: Forgotten Feminist and Socialist” (på engelska). Nineteenth-Century French Studies 1 (4): sid. 229-234. http://www.jstor.org/stable/23535978. ”In 1843, five years before Karl Marx's Communist Manifesto, Flora Tristan wrote in her own manifesto, Workers' Union (L'Union ouvrière): "Workers of the world unite!" In that same year, Marx was still a liberal democrat.”.
